Integrating Inkjet Printing with Nanoporous Structures for High-throughput Manufacturing of 3D Heterogeneous Nanostructures

该奖项的研究成果将通过强大的沉积控制将卷对卷兼容的喷墨打印工艺扩展到第三维，从纳米多孔基材的完全或部分填充到高度可重复的纳米级阵列的沉积。在纳米多孔基底内按需滴注印刷能够封装用于药物递送的多功能治疗材料，并精确控制释放和局部递送用于组织再生的生长因子。纳米模板印刷允许纳米阵列的大面积沉积，用于生物分子的快速筛选和有效的化学检测。通过调整油墨-基底相互作用，实现了高度有序的3D纳米结构的高通量生产。该项目将为能源纳米制造课程提供新的实验室演示，并直接受益于可打印太阳能电池和固态照明的高度相关的行业项目。社区外展计划将通过费城科学节和德雷克塞尔的K-12教育计划国家工程院大挑战扩展到费城市中心的K-12学生。该奖项支持将喷墨打印功能材料与纳米多孔结构相结合的基础研究，用于高通量制造3D异质纳米结构，用于能源，生物医学和传感应用。具体而言，该研究将结合联合收割机原位成像，多尺度建模和先进的表征，以检查喷墨打印功能墨水在纳米多孔基底上的同时润湿，渗透和蒸发，以及随后的粒子自组装和沉积过程，无论是内部还是通过纳米孔。同步高速相机，共聚焦显微镜和激光干涉仪设置将直接观察3D纳米打印过程中的复杂传输现象。一个多尺度的方法，集成了一个介观尺度的格子玻尔兹曼模型在整个下降的水平和分子动力学模型探测纳米粒子与接触线内的一个单一的孔的相互作用，将开发捕捉的径向依赖的渗透过程中nanopores。该项目的目标是建立纳米多孔模板3D纳米打印的结构-工艺-性能关系。

Research results from this award will extend the roll-to-roll compatible inkjet printing process into the 3rd dimension with robust deposition controls, from complete or partial filling of nanoporous substrates to deposition of highly repeatable nanoscale arrays. Drop-on-demand printing inside nanoporous substrates enables encapsulation of multi-functional therapeutic materials for drug delivery with precisely controlled release and localized delivery of growth factors for tissue regeneration. Nanotemplated printing allows for large-area deposition of nanoarrays for rapid screening of biomolecules and efficient chemical detections. By tuning ink-substrate interactions, high-throughput production of highly ordered 3D nanostructures is achieved. This project will enable new laboratory demonstrations for the Nanomanufacturing for Energy course and directly benefit highly related industry projects on printable solar cells and solid-state lighting. The community outreach programs will extend to Philadelphia inner-city K-12 students through the Philly Science Festival and Drexel's K-12 Education Program on National Academy of Engineering Grand Challenges.This award supports fundamental research on integrating inkjet printing of functional materials with nanoporous structures for high-throughput manufacturing of 3D heterogeneous nanostructures for energy, biomedical, and sensing applications. Specifically, the research will combine in-situ imaging, multi-scale modeling, and advanced characterization to examine the simultaneous wetting, infiltration, and evaporation of inkjet-printed functional inks onto nanoporous substrates and the subsequent particle self-assembly and deposition processes both inside and through nanopores. A synchronized high-speed camera, confocal microscope, and laser interferometry setup will directly observe the complex transport phenomena during the 3D nanoprinting process. A multi-scale approach, integrating a mesoscale lattice Boltzmann model at the entire drop level and a molecular dynamics model for probing interactions of nanoparticles with the contact line inside a single pore, will be developed to capture the radial-dependent infiltration process in nanopores. The project goal is to build the structure-process-property relationship for nanoporous-templated 3D nanoprinting.